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CVE-2023-52462 The advisory has been revoked - it doesn't affect any version of package bpftool  (opens in a new tab)

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EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-CENTOS8-BPFTOOL-6271393
  • published24 Feb 2024
  • disclosed23 Feb 2024
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Introduced: 23 Feb 2024

CVE-2023-52462  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos.

In the Linux kernel, the following vulnerability has been resolved:

bpf: fix check for attempt to corrupt spilled pointer

When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0].

To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.